本文件规定了一种电位滴定法，用于测定铁矿石中的总铁含量，在用氯化锡（II）和氯化钛（III）还原铁（III）后，使用重铬酸钾作为滴定剂。然后，多余的还原剂被重铬酸钾溶液氧化。 本方法适用于天然铁矿石、铁精矿和烧结矿（包括烧结矿产品）中质量分数在29.04%和72.02%之间的总铁含量。

This document specifies a potentiometric titration method for the determination of total iron content of iron ores, using potassium dichromate as titrant after reduction of the iron(III) by tin(II) chloride and titanium(III) chloride. The excess reductant is then oxidized by potassium dichromate solution. This method is applicable to total iron contents between a mass fraction of 29,04 % and a mass fraction of 72,02 % in natural iron ores and iron ore concentrates and agglomerates including sinter products.